Sometimes during the early stage of pregnancy, the implantation stage can cause mild cramping. Either that, or you're under a lot of stress and your body is trying it's hardest to start and all it can do is cramp up. Get a test grl!
I am having the same issue, I am 6 days late though and have been cramping for 5 but havent started...Some of my friends are saying that I am probablly pregnant but I dont know I guess I just need to go get a test.